FISSION YIELDS OF MASSES 131, 132, 134, AND 136 FORMED IN NEUTRON FISSION OF URANIUM

Abstract

The ratio of I131 (8.0 days) to Ba140 has been determined in neutron fission of uranium and the fission yield of the former calculated to be 2.23 × 10−2 from the previously reported value for Ba140. This in turn permits the estimation of fission yields for the 132, 134, and 136 fission chains, the relative abundance of which, together with that of 131, has been obtained by Thode. The ratio of 54 min. I to Ba139 has been determined. Using the previously reported value for the fission yield of Ba139, that for the iodine was found to be 5.75 × 10−2. A mass of 134 is assigned to the 54 min. I on the basis of Thode's data.